An analysis for stress of a slingshot substructure ( recently developed by DRECO Co. ) during raising operation with Integral winches is made in this paper.

• 本文对美国近期研制的弹弓式井架底座整体起升过程进行了受力分析,从理论上证明了这种新结构的可行性及其重要特性,为采用这一型式提供了必要的前提。